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WO2017080738A1 - Pompe, en particulier pompe haute pression d'un système d'injection de carburant - Google Patents

Pompe, en particulier pompe haute pression d'un système d'injection de carburant Download PDF

Info

Publication number
WO2017080738A1
WO2017080738A1 PCT/EP2016/074383 EP2016074383W WO2017080738A1 WO 2017080738 A1 WO2017080738 A1 WO 2017080738A1 EP 2016074383 W EP2016074383 W EP 2016074383W WO 2017080738 A1 WO2017080738 A1 WO 2017080738A1
Authority
WO
WIPO (PCT)
Prior art keywords
pump
spring plate
plunger
assembly
plunger body
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP2016/074383
Other languages
German (de)
English (en)
Inventor
Jochen Knust
Martin Hoeller
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Priority to EP16779128.4A priority Critical patent/EP3374624A1/fr
Priority to CN201680065970.7A priority patent/CN108350845A/zh
Publication of WO2017080738A1 publication Critical patent/WO2017080738A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
    • F02M59/10—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by the piston-drive
    • F02M59/102—Mechanical drive, e.g. tappets or cams
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/0404—Details or component parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/0404—Details or component parts
    • F04B1/0426—Arrangements for pressing the pistons against the actuated cam; Arrangements for connecting the pistons to the actuated cam

Definitions

  • the pump piston is held together with a pump cylinder head via a frictional connection, which is achieved by a sealing element.
  • the pump piston is connected on the other side by means of the spring plate form-fitting manner with the plunger body.
  • the pump cylinder head and a plunger assembly are firmly connected together enough that unwanted disassembly of both elements is prevented by the weight of the plunger assembly. This is advantageous because this allows the entire pump can be easily transported as a part and the pump can be installed at the customer in just one assembly step.
  • the inventive design of the pump that is formed by the connecting element pump piston an assembly assembly of the pump cylinder head and the plunger assembly, as described in claim 4. This simplifies the logistics before assembly and the assembly process itself, since the pump can be better transported and installed as a composite assembly, as is the case with a 2-part solution.
  • the pump during transport in unassembled state ie before installation in, for example, an internal combustion engine, forms a captive.
  • the friction of the seal is reduced and the movement of the pump piston can be done with less force.
  • FIG. 1 shows a pump according to the invention in a perspective view
  • FIG. 6 shows a section of the spring plate labeled VII in FIG. 5 according to a first exemplary embodiment of the radial projections
  • FIG. 7 shows a section of the spring plate labeled VII in FIG. 5 according to a second exemplary embodiment of the radial projections
  • the cylinder head assembly 3 has, inter alia, as individual parts, a pump cylinder head 5 which comprises a pump cylinder 4 and a cylinder bore 11, wherein the cylinder bore 11 forms a cylindrical and oblong opening.
  • a pump cylinder head 5 which comprises a pump cylinder 4 and a cylinder bore 11, wherein the cylinder bore 11 forms a cylindrical and oblong opening.
  • the one Has enlarged foot 41 on the pump cylinder 4 side facing away.
  • the pump piston 13 is cylindrical in the radial direction and elongate in the axial direction, so that the pump piston with its side remote from the enlarged foot 41 fits into the cylindrical and oblong opening of the cylinder bore.
  • the sealing element 15 is located in the pump cylinder head 5 and has at least one sealing lip on the pump piston 13 under prestress.
  • the sealing element 15 is formed cylindrically in particular in the region of the sealing lip and the contact area with the pump piston 13. Furthermore, the cylinder head assembly 3 has a limited in the cylinder bore 11 through the pump piston 13 pump chamber 35, which is only partially visible in Fig. 2, and a plunger spring 19, which is located on the pump cylinder head 5 in Appendix.
  • the plunger spring 19 has the function of the cylinder head assembly 3 and the plunger body assembly 9, where the plunger spring 19 is in each case in abutment in the installed state and operation to push apart to ensure the translational downward movement.
  • the plunger spring 19 is located with a plunger body 21 via a spring plate 17 in abutment and thus exerts an axial force on the plunger body 21 and the plunger assembly 9 from. In particular, the spring force of the translational force, which results from the rotational movement of the camshaft
  • the expression of the sealing element 15 with at least one sealing lip which bears under pretension on the pump piston 13 causes a clamping force which holds the pump piston 13 non-positively in the cylinder bore 11 in the axial direction and thus forms the upper part of the assembly assembly.
  • the holding force that acts on the pump piston 13 caused by the sealing element 15 biasing clamping force is so great that it at least the force of the dead weight of the plunger assembly 9 including the plunger spring 19 and the pump piston piston 13 corresponds.
  • Fig. 3 shows how the lower part of the assembly assembly is formed between the pump piston 13 and the plunger body 21 by means of the spring plate 17.
  • the spring plate 17 is connected to the pump piston 13 such that the spring plate 17 in the middle has an opening 45 which is large enough that a
  • the enlarged foot 41 of the pump piston 13 is brought into abutment with the plunger body 21 on the shoulder 37 in the region of the first recess 39, in particular so that the enlarged foot 41 is placed centrally in the region of the first recess 39.
  • the outer diameter of the spring plate 17 and the circumferential elevation on the inside of the plunger body 21 have a slight excess to each other.
  • the spring plate 17 is inserted into the open region of the plunger body 21 and moved over the circumferential in the radial direction elevation 27 of the plunger body 21, so that the spring plate 17 passes by means of a detent in the end position and in the axial direction positively between paragraph 37 and the elevation 27.
  • FIG. 6 shows a first exemplary embodiment of the radial projection 6, in which the radial projection 6 is embodied such that it protrudes radially as a bulge over a relatively small area of the circumference of the spring plate 17 and thus increases the outside diameter in this area ,
  • the regular course of the outer diameter without radial projection 6 is shown in dashed lines in FIG. 6 as a reference.
  • a fourth embodiment of the radial projection 6 is shown.
  • the radial projection 6 is pronounced S-shaped.
  • the contour of the radial projection 6 is S-shaped and is formed as the, in the circumferential direction over a peripheral region S2 extending, S-shaped nose 14 and a second recess 12.
  • the outer diameter of the spring plate 17 is increased.
  • the regular course of the outer diameter without radial projection 6 is shown in dashed lines in FIG. 8 as a reference.
  • the circumferential area S2 in FIG. 9 is larger than the circumferential area si in FIG. 8.
  • the lug 14 in the fourth embodiment is more easily elastically deformable compared with the third exemplary embodiment.
  • Fig. 10 shows further assembly enhancing forms of the elements, in particular the rounded profile 33 of the plunger body 21 in the area of the circumferential elevation 27.
  • This allows the spring plate 17 are moved in the insertion direction VIII with less force applied to the elevation 27 and in its final position between the elevation 27 and the paragraph 37 of the plunger body 21 are moved by means of the detent.
  • These inventive expression supporting properties are in particular the small excess between the elements spring plate 17 and plunger body 21, which ensures a sustained positive connection.
  • a radius 31 of the spring plate acts as a further, the assembly-enhancing expression.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

L'invention concerne une pompe (1), en particulier une pompe haute pression d'un système d'injection de carburant, comprenant une tête de cylindre de pompe (5) qui comprend un cylindre de pompe (4) et un alésage de cylindre (11), comprenant un piston de pompe (13) disposé dans l'alésage de cylindre (11), lequel piston de pompe est déplaçable en translation vers le haut et vers le bas et coopère avec un dispositif d'entraînement par le biais d'un module de poussoir (9), le piston de pompe (13) étant relié à une coupelle de ressort (17) et s'appliquant contre le module de poussoir (9), un élément d'étanchéité (15) étant disposé entre le piston de pompe (13) et la tête de cylindre de pompe (5), et un ressort de poussoir (19) s'appuyant par le biais de la coupelle de ressort (17) dans un corps de poussoir (21) du module de poussoir (9). Selon l'invention, la coupelle de ressort (17) est maintenue dans le corps de poussoir (21) et le piston de pompe (13) est maintenu à force dans la tête de cylindre de pompe (5) par le biais d'une force de serrage, assurant une précontrainte, de l'élément d'étanchéité (15).
PCT/EP2016/074383 2015-11-12 2016-10-12 Pompe, en particulier pompe haute pression d'un système d'injection de carburant Ceased WO2017080738A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP16779128.4A EP3374624A1 (fr) 2015-11-12 2016-10-12 Pompe, en particulier pompe haute pression d'un système d'injection de carburant
CN201680065970.7A CN108350845A (zh) 2015-11-12 2016-10-12 泵、尤其燃料喷射系统的高压泵

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102015222329 2015-11-12
DE102015222329.9 2015-11-12
DE102016203768.4 2016-03-08
DE102016203768.4A DE102016203768B4 (de) 2015-11-12 2016-03-08 Pumpe, insbesondere Hochdruckpumpe eines Kraftstoffeinspritzsystems, mit einem Montageverbund von Stößel-Baugruppe und Pumpenzylinderkopf, insbesondere durch eine Rastverbindung zwischen Federteller und Stößelkörper

Publications (1)

Publication Number Publication Date
WO2017080738A1 true WO2017080738A1 (fr) 2017-05-18

Family

ID=58640232

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2016/074383 Ceased WO2017080738A1 (fr) 2015-11-12 2016-10-12 Pompe, en particulier pompe haute pression d'un système d'injection de carburant

Country Status (4)

Country Link
EP (1) EP3374624A1 (fr)
CN (1) CN108350845A (fr)
DE (1) DE102016203768B4 (fr)
WO (1) WO2017080738A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4401074A1 (de) * 1994-01-15 1995-07-20 Elasis Sistema Ricerca Fiat Pumpenanordnung, insbesondere zur Förderung von Kraftstoff aus einem Vorratsbehälter zu einer Brennkraftmaschine
DE19829546A1 (de) * 1998-07-02 2000-01-13 Bosch Gmbh Robert Radialkolbenpumpe
WO2003031816A1 (fr) * 2001-09-28 2003-04-17 Siemens Aktiengesellschaft Element d'assemblage pour assembler un piston et un element de rappel
DE102010011436A1 (de) * 2010-03-15 2011-09-15 Schaeffler Technologies Gmbh & Co. Kg Baueinheit für eine Kraftstoffhochdruckpumpe
DE102010039205A1 (de) * 2010-08-11 2012-02-16 Robert Bosch Gmbh Stößelausrichtung und Stößelverdrehsicherung
DE102012204264A1 (de) * 2012-03-19 2013-09-19 Robert Bosch Gmbh Hochdruckpumpe

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2406731A2 (fr) * 1977-10-19 1979-05-18 Semt Pompe d'injection de combustible
DD138347B1 (de) * 1978-08-07 1981-03-25 Guenter Wolff Einrichtung zur kupplung von antriebsstoessel und pumpenstempel einer kraftstoff-einspritzpumpe
DD288433A5 (de) * 1989-10-13 1991-03-28 Veb Einspritzgeraetewerk Aken,De Einsteckeinheit fuer brennstoffeinspritzpumpen in reihenbauart
GB9012843D0 (en) * 1990-06-08 1990-08-01 Lucas Ind Plc Fuel injection apparatus
DE4118555A1 (de) * 1991-06-06 1992-12-10 Bosch Gmbh Robert Foerderbeginnverstelleinrichtung einer kraftstoffeinspritzpumpe
DE10106983A1 (de) * 2001-02-15 2002-08-29 Ina Schaeffler Kg Stößel
DE102004004705A1 (de) * 2004-01-30 2005-08-18 Robert Bosch Gmbh Hochdruckpumpe, insbesondere für eine Kraftstoffeinspritzeinrichtung einer Brennkraftmaschine
DE102008007026B3 (de) * 2008-01-31 2009-06-10 Continental Automotive Gmbh Verfahren zur Herstellung einer Stößelbaugruppe für eine Hochdruckpumpe
DE102009000835A1 (de) 2009-02-13 2010-08-19 Robert Bosch Gmbh Modulare Niederdruckeinheit und modulare Pumpenanordnung
DE102009028394A1 (de) * 2009-08-10 2011-02-17 Robert Bosch Gmbh Hochdruckpumpe
DE102010030498A1 (de) * 2010-06-24 2011-12-29 Robert Bosch Gmbh Pumpe, insbesondere Kraftstoffhochdruckpumpe
DE102010042484A1 (de) * 2010-10-15 2012-04-19 Robert Bosch Gmbh Hochdruckpumpe für eine Kraftstoffeinspritzvorrichtung
DE102010063363A1 (de) * 2010-12-17 2012-06-21 Robert Bosch Gmbh Hochdruckpumpe
DE102012218122A1 (de) * 2012-10-04 2014-04-10 Robert Bosch Gmbh Kraftstoffhochdruckpumpe für ein Kraftstoffeinspritzsystem
EP2821646A1 (fr) * 2013-07-01 2015-01-07 Delphi International Operations Luxembourg S.à r.l. Pompe haute pression

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4401074A1 (de) * 1994-01-15 1995-07-20 Elasis Sistema Ricerca Fiat Pumpenanordnung, insbesondere zur Förderung von Kraftstoff aus einem Vorratsbehälter zu einer Brennkraftmaschine
DE19829546A1 (de) * 1998-07-02 2000-01-13 Bosch Gmbh Robert Radialkolbenpumpe
WO2003031816A1 (fr) * 2001-09-28 2003-04-17 Siemens Aktiengesellschaft Element d'assemblage pour assembler un piston et un element de rappel
DE102010011436A1 (de) * 2010-03-15 2011-09-15 Schaeffler Technologies Gmbh & Co. Kg Baueinheit für eine Kraftstoffhochdruckpumpe
DE102010039205A1 (de) * 2010-08-11 2012-02-16 Robert Bosch Gmbh Stößelausrichtung und Stößelverdrehsicherung
DE102012204264A1 (de) * 2012-03-19 2013-09-19 Robert Bosch Gmbh Hochdruckpumpe

Also Published As

Publication number Publication date
DE102016203768A1 (de) 2017-05-18
EP3374624A1 (fr) 2018-09-19
CN108350845A (zh) 2018-07-31
DE102016203768B4 (de) 2017-10-26

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